org.sindice.siren.search.node

Class NodeWildcardQuery

java.lang.Object

org.apache.lucene.search.Query

org.sindice.siren.search.node.NodeQuery

org.sindice.siren.search.node.NodePrimitiveQuery

org.sindice.siren.search.node.MultiNodeTermQuery

org.sindice.siren.search.node.NodeAutomatonQuery

org.sindice.siren.search.node.NodeWildcardQuery

All Implemented Interfaces:

Cloneable

public class NodeWildcardQuery
extends NodeAutomatonQuery

A NodePrimitiveQuery that implements the wildcard search query.

Supported wildcards are *, which matches any character sequence (including the empty one), and ?, which matches any single character. Note this query can be slow, as it needs to iterate over many terms. In order to prevent extremely slow WildcardQueries, a Wildcard term should not start with the wildcards *.

This query uses the MultiNodeTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT rewrite method.

Code taken from WildcardQuery and adapted for SIREn.

See Also:

AutomatonQuery

Nested Class Summary

Nested classes/interfaces inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

MultiNodeTermQuery.RewriteMethod

Field Summary

Fields

Modifier and Type	Field and Description
static char	WILDCARD_CHAR Char equality with support for wildcards
static char	WILDCARD_ESCAPE Escape character
static char	WILDCARD_STRING String equality with support for wildcards

Fields inherited from class org.sindice.siren.search.node.NodeAutomatonQuery

automaton, compiled, term

Fields inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

CONSTANT_SCORE_AUTO_REWRITE_DEFAULT, CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE, CONSTANT_SCORE_FILTER_REWRITE, field, rewriteMethod, SCORING_BOOLEAN_QUERY_REWRITE

Fields inherited from class org.sindice.siren.search.node.NodePrimitiveQuery

datatype

Fields inherited from class org.sindice.siren.search.node.NodeQuery

ancestor, levelConstraint, lowerBound, upperBound

Constructor Summary

Constructors

Constructor and Description
NodeWildcardQuery(org.apache.lucene.index.Term term)

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.lucene.index.Term	getTerm() Returns the pattern term.
static org.apache.lucene.util.automaton.Automaton	toAutomaton(org.apache.lucene.index.Term wildcardquery) Convert wildcard syntax into an automaton.
String	toString(String field) Prints a user-readable version of this query.

Methods inherited from class org.sindice.siren.search.node.NodeAutomatonQuery

equals, getTermsEnum, hashCode

Methods inherited from class org.sindice.siren.search.node.MultiNodeTermQuery

getField, getRewriteMethod, getTermsEnum, rewrite, setRewriteMethod

Methods inherited from class org.sindice.siren.search.node.NodePrimitiveQuery

setDatatype, wrapToStringWithDatatype

Methods inherited from class org.sindice.siren.search.node.NodeQuery

getDocsNodesAndPositionsEnum, getLevelConstraint, getNodeConstraint, setAncestorPointer, setLevelConstraint, setNodeConstraint, setNodeConstraint

Methods inherited from class org.apache.lucene.search.Query

clone, createWeight, extractTerms, getBoost, setBoost, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

WILDCARD_STRING

public static final char WILDCARD_STRING

String equality with support for wildcards

See Also:

Constant Field Values

WILDCARD_CHAR

public static final char WILDCARD_CHAR

Char equality with support for wildcards

See Also:

Constant Field Values

WILDCARD_ESCAPE

public static final char WILDCARD_ESCAPE

Escape character

See Also:

Constant Field Values

Constructor Detail

NodeWildcardQuery

public NodeWildcardQuery(org.apache.lucene.index.Term term)

Method Detail

toAutomaton

public static org.apache.lucene.util.automaton.Automaton toAutomaton(org.apache.lucene.index.Term wildcardquery)

Convert wildcard syntax into an automaton.

getTerm

public org.apache.lucene.index.Term getTerm()

Returns the pattern term.

toString

public String toString(String field)

Prints a user-readable version of this query.

Overrides:

toString in class NodeAutomatonQuery